/*
 * Copyright 2012 The Netty Project
 *
 * The Netty Project licenses this file to you under the Apache License,
 * version 2.0 (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at:
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */
package com.wct;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelFutureListener;
import io.netty.channel.ChannelHandlerAdapter;
import io.netty.channel.ChannelHandlerContext;
import io.netty.util.ReferenceCountUtil;

import java.nio.ByteBuffer;

import com.wct.util.PackageBuilder;

/**
 * Handler implementation for the echo client. It initiates the ping-pong traffic between the echo client and server by
 * sending the first message to the server.
 */
public class EchoClientHandler extends ChannelHandlerAdapter
{

    private PackageBuilder builder = new PackageBuilder();

    private Long devicesn;

    private ChannelHandlerContext ctx;

    private int count = 0;

    /**
     * Creates a client-side handler.
     */
    public EchoClientHandler(Long devicesn)
    {
        this.devicesn = devicesn;
    }

    @Override
    public void channelActive(ChannelHandlerContext ctx)
    {
        this.ctx = ctx;
        ByteBuffer buff = builder.makelogin(devicesn);
        buff.position(0);
        ByteBuf resp = Unpooled.copiedBuffer(buff);
        ctx.writeAndFlush(resp);
    }

    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg)
    {
        try
        {
            sendNumbers();
        }
        catch (InterruptedException e)
        {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        finally
        {
            ReferenceCountUtil.release(msg);
        }
    }
    
    private void sendNumbers()
        throws InterruptedException
    {
        count++;
        if (count < 101)
        {

            Thread.sleep(100);

            ChannelFuture future = null;
            ByteBuffer buff = builder.makeGPS(devicesn);
            buff.position(0);
            ByteBuf resp = Unpooled.copiedBuffer(buff);
            future = ctx.writeAndFlush(resp);
            future.addListener(numberSender);
        }
        else
        {
            ctx.close();
        }

    }
    
    // @Override
    // public void channelReadComplete(ChannelHandlerContext ctx) {
    // ctx.flush();
    // }
    private final ChannelFutureListener numberSender = new ChannelFutureListener()
    {
        @Override
        public void operationComplete(ChannelFuture future)
            throws Exception
        {
            if (future.isSuccess())
            {
                sendNumbers();
            }
            else
            {
                future.cause().printStackTrace();
                future.channel().close();
            }
        }
    };

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause)
    {
        // Close the connection when an exception is raised.
        cause.printStackTrace();
        ctx.close();
    }
}
